Ds1(7) fell off his bike in the park and seems to have somehow landed on his head (I heard the fall but didn't see how he landed). He was wearing a helmet. Complained that his head was ringing. Sat him down for 5 minutes then took him home. Since the he has just been lying on the sofa half-dozing and has now thrown up (some 1 and a half hours after fall). He is looking fairly pale but no sign of injury, though he is complaining that his head still hurts.
Per NHS website, throwing up means a trip to A&E. Realistic or a waste of time? I've seen NHS direct being rather quick to suggest A&E or dialling 999 before now.